ubuntu sem som

[mmn666]

olá pessoal,

primeiro peço desculpas se já houver algum tópico tratando sobre o meu problema pois se ele existe não o encontrei...

ganhei um note de um familiar ...toshiba satellite formatei ele e instalei o ubuntu9.10...lindo ...porém o som não está funfando

lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
03:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
0a:04.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
0a:04.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller
0a:04.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)
0a:04.3 SD Host controller: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller
0a:08.0 Ethernet controller: Intel Corporation PRO/100 VE Network Connection (rev 02)

cat /proc/asound/card0/codec#* | grep Codec
Codec: Conexant CX20551 (Waikiki)

bom entao até ai achei um tutorial falando pra baixar o alsa-base
e alterar um arquivo de configuracao colocando uma linha de codigo no final

sudo gedit /etc/modprobe.d/alsa-base.conf

(linha adicionada)
options snd-hda-intel model=toshiba


não adiatou nada ...continuo sem som ....
por isso venho aqui pedir ajuda a voces....

obrigado pela atenção
Mario